[0/4] target/i386: use TSTEQ/TSTNE in x86 frontend

Message ID	20240228111151.287738-1-pbonzini@redhat.com
Headers	show Return-Path: <qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org> From: Paolo Bonzini <pbonzini@redhat.com> To: qemu-devel@nongnu.org Cc: richard.henderson@linaro.org Subject: [PATCH 0/4] target/i386: use TSTEQ/TSTNE in x86 frontend Date: Wed, 28 Feb 2024 12:11:47 +0100 Message-ID: <20240228111151.287738-1-pbonzini@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=170.10.133.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.088, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action Precedence: list Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org
Series	target/i386: use TSTEQ/TSTNE in x86 frontend \| expand [0/4] target/i386: use TSTEQ/TSTNE in x86 frontend [1/4] target/i386: use TSTEQ/TSTNE to test low bits [2/4] target/i386: use TSTEQ/TSTNE to check flags [3/4] target/i386: remove mask from CCPrepare [4/4] tcg/optimize: optimize TSTNE using smask and zmask

Message ID

20240228111151.287738-1-pbonzini@redhat.com

Headers

From: Paolo Bonzini <pbonzini@redhat.com>
To: qemu-devel@nongnu.org
Cc: richard.henderson@linaro.org
Subject: [PATCH 0/4] target/i386: use TSTEQ/TSTNE in x86 frontend
Date: Wed, 28 Feb 2024 12:11:47 +0100
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Series

target/i386: use TSTEQ/TSTNE in x86 frontend | expand

Message

Paolo Bonzini Feb. 28, 2024, 11:11 a.m. UTC

The TSTEQ/TSTNE operations can be useful to evaluate many conditionals.
They can be used to test the sign bit or equality to zero of a partial
register, as well as to check individual bits in EFLAGS.

Paolo

Based-on: <20240228110641.287205-1-pbonzini@redhat.com>

Paolo Bonzini (4):
  target/i386: use TSTEQ/TSTNE to test low bits
  target/i386: use TSTEQ/TSTNE to check flags
  target/i386: remove mask from CCPrepare
  tcg/optimize: optimize TSTNE using smask and zmask

 target/i386/tcg/translate.c | 115 ++++++++++++++++--------------------
 tcg/optimize.c              |  13 ++--
 target/i386/tcg/emit.c.inc  |   5 +-
 3 files changed, 60 insertions(+), 73 deletions(-)